Trolley-wheel.



No. 703,701. I Patented luly l, I902.

W. F. HALL.

TRULLEY WHEEL.

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- UNITED STATES PATENT DFFIQE.

lVILLlAM F. HALL, OF BOSTON, MASSACHUSETTS.

TROLLEY-WHEEL.

SPECIFICATION forming part of Letters Patent No. 703,701, dated July 1, 1902.

Application filed April 30, 1902.

T0 whom, it may concern:

Be it known that I, WILLIAM F. HALL, a citizen of the UnitedStates, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented certain Improvements in Trolley-Wheels, of which the following is a specification."

My invention relates to separable trolleywheels composed'of a central grooved portion for contact with the trolley-wire, side disks arranged on opposite sides of the same, and a central sleeve or bushing forming a bearing for the axle. To provide a simple and reliable means for clamping and holding together the several parts or members of a wheel of this description is the object of my invention, which consists in the combination, with the central portion and side disks of a separable,trolley-wheel, of a series of flanged keys fitted within thecentral opening or bore of the wheel and forming when in place there in a sectional hub having its members spaced apart and a central bushing driven into said sectional hub and serving to hold its members firmly in place against the walls of the central opening with the flanges at their outer ends bearing against the outer faces of the side disks, whereby the several parts of the wheel are securely clamped and held together without liability of becoming loosened or separated from each other, as hereinafter more fully set forth.

In the accompanying drawings, Figure 1 is a side elevation of a trolley-wheel constructed in accordance with my invention. Fig. 2 is a vertical section of the same on theline 2 2 of Fig. 1. of Fig. 2.

Fig. 3 is a section on the line 3 3' Fig. 4t is a perspective view ofone of the members of the sectionalhub.

In the said drawings, A represents the central portion of a separable, trolley-wheel pref-.

erably composed of copper, bronze, or like metal having a high degree of conductivity and provided with a peripheral groove for contact with the trolley-wire, which is 'retained in place by the side disks or flanges B 13, preferably composed of steel and arranged on opposite sides of the central portion A, each disk being provided with a central opening 19, coincident with the central bore 0 of the portion A. Within the central bore 0 are inserted a series of concavo-con- Serial No. 105,395. (No model.)

vex keys 01, each forming a section of a hub or sleeve and being provided at its opposite ends with outwardly-projecting.flanges 10, which when the keyis in place lap over and bear against the'onter faces of the side disks or flanges B, as shown in Figs. land 2. These keys (1 are spaced apart and maintained at a uniform distancefrom each other by lugs 12,

projectinginto the central bore of the wheel and occupying the spaces between theseveral sections of the hub, the central opening of each side disk B being also provided with similar lugs 14, which'engage the said. spaces or openings betweenthekeys, whereby the several parts are securely locked in place and rotary movement independently of each other prevented. Within the sectional hub thus formedis driven an antifriction-bushing 15, whichacts to hold the keys or sections (1 securelyinplace with their flanges 10 against the outer faces of the disks B, the several parts of the wheel being thus firmly locked together and prevented from becoming loose or disconnected from each other, while when the central portion A becoines worn and requires to be replaced by a new one it is simply necessary to drive out the central bushing 15, when the keys d can be removed, leaving the side disks free to be separatedfrom the central portion A. The antifriction-bushing 15 may be of any suitable or approved construction, that here shown-being provided at its opposite ends and on its inner surface with grooves for containing powdered graphite or other similar lubricant.

Wh'at I claim as my invention, and desire .to secure by Letters Patent, is-

'1. In a separable trolley-wheel, the combination with; the central portion and side disks arranged upon opposite sides of the same, of a sectional hub composed of a series of concave-convex keys provided at their opposite ends with outwardly extending flanges adapted to overlap and bear against the side disks to hold the latter inplace against the central portion, and a central sleeve or bushing driven into said sectionalhub to hold its members in place within the centralbore of the wheel.

2. A separable trolley-wheel comprising a central portion, side disks or flanges arranged on opposite sides of the same, said central portion and disks having their central opensaid sectional hub and acting to hold its ings provided with inwardly-projecting lugs, members in place Within the central bore of a sectional hub composed of a series of 0011- the wheel.

cavo-convex keys lying in the grooves or lVitness my hand this 26th day of April,

5 spaces between said lugs, said keys being A. D. 1902.

provided at their opposite ends with out-, 1 v Wardly-projeeting flanges adapted to overlap VILLIAM HALL and bear against the side disks to hold the In presence of latter in place against the central portion, P. E. TESCHEMACHER,

To and a central sleeve or bushing driven into '1. E. OBRIEN. 

